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EP0522071B1 - Safety razors and blade units therefor - Google Patents

Safety razors and blade units therefor Download PDF

Info

Publication number
EP0522071B1
EP0522071B1 EP91907778A EP91907778A EP0522071B1 EP 0522071 B1 EP0522071 B1 EP 0522071B1 EP 91907778 A EP91907778 A EP 91907778A EP 91907778 A EP91907778 A EP 91907778A EP 0522071 B1 EP0522071 B1 EP 0522071B1
Authority
EP
European Patent Office
Prior art keywords
blade
frame
support
razor head
safety razor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91907778A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0522071A4 (en
EP0522071A1 (en
Inventor
Kevin James Wain
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gillette Co LLC
Original Assignee
Gillette Co LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gillette Co LLC filed Critical Gillette Co LLC
Publication of EP0522071A1 publication Critical patent/EP0522071A1/en
Publication of EP0522071A4 publication Critical patent/EP0522071A4/en
Application granted granted Critical
Publication of EP0522071B1 publication Critical patent/EP0522071B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
    • B26B21/08—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor involving changeable blades
    • B26B21/14—Safety razors with one or more blades arranged transversely to the handle
    • B26B21/22—Safety razors with one or more blades arranged transversely to the handle involving several blades to be used simultaneously
    • B26B21/222—Safety razors with one or more blades arranged transversely to the handle involving several blades to be used simultaneously with the blades moulded into, or attached to, a changeable unit
    • B26B21/227—Safety razors with one or more blades arranged transversely to the handle involving several blades to be used simultaneously with the blades moulded into, or attached to, a changeable unit with blades being resiliently mounted in the changeable unit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
    • B26B21/02—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor involving unchangeable blades

Definitions

  • This invention relates to safety razors and to blade units for incorporation in safety razors.
  • the instant invention aims at the provision of a safety razor having a high degree of "conformance", that is to say the ability to permit or constrain the skin-engaging elements of the razor to maintain optimum contact with the varying contours of the skin during a shaving operation.
  • U.S. Patent No. 4,443,940 discloses a safety razor head adapted to permit rotation of an individual blade and attached guard member relative to a fixed frame during a shaving operation.
  • U.S. Patent No. 4,586,255 discloses a safety razor head in which at least one blade unit may move vertically relative to a fixed frame during a shaving operation, but does not permit rotational motion of the individual blade unit.
  • a safety razor head with the features of claim 1. characterized in that said spring bears on said elongated base and bears upwardly at its ends to enable substantially vertical movement of said blade and integral guard, relative to the frame, under forces encountered during shaving and against the action of spring restoring forces, in directions generally perpendicular to a plane defined by the blade edge and a skin engaging surface of the guard portion, thus allowing the blade with integral guard, in use, to maintain optimum contact with the varying contours of the skin.
  • each said slot includes a recess having forward and rear abutment face for engaging a portion of the blade support to limit rotation of said support during shaving.
  • the razor head shown in Figs. 1 to 4 comprises a metal or moulded plastics head frame 1 having an elongate base 2 and upstanding end walls 3 at opposite ends thereof. Only one end of the frame is shown in these Figs. the opposite end being a mirror image.
  • the head frame supports a cap member 4, two blade units 5 and three pairs of cantilever wire springs 6, whose inner ends (not shown) are secured to the medial portion of the elongate base.
  • Each blade unit 5 consists of a narrow blade 7, having a sharpened cutting edge 7A, and a blade support formed as an L-shaped metal stamping to provide a platform 9 and a guard portion providing a curved skin engaging guard surface 11 and a depending leg 12.
  • the support has a slot 13 over most of its length to form a space between the platform 9 and the guard portion and the blade 7 is securely attached to the platform with its edge 7A projecting forwardly into that space, forwardly of the platform.
  • the support 8 is formed with upwardly offset, projecting ears 14 which are abuttingly engaged from below by upstanding end portions 6A of the wire springs 6.
  • the cap member 4 consists of a channel shaped support 16 in which a cap moulding 17 is secured.
  • the cap member and blade units are captured at their ends in recesses formed in the end walls 3 of the head frame. More specifically, the ears 14 of the blade supports engage in narrow vertical slots 18 which also receive the vertical end portions 6A of the respective wire springs. Alongside each slot 18 is a shallower, wider recess 19 whose forward face 21 acts as a stop for the adjacent end of the respective leg 12.
  • each blade unit is guided for vertical movement in the head frame by engagement of its ears 14 in the slots 18.
  • the springs 6 are pre-stressed so that in the normal, rest position, the blade units are held by the springs in their outermost positions, as shown in Fig. 3.
  • the spring ends 6A are guided and constrained for vertical movement in their respective slots 18 and are pointed at their upper ends, where they engage the ears 14 so as to provide fulcrums, permitting rotational movement of the units about axes parallel with and close to the cutting-edges of the respective blades. As best illustrated in Fig. 4, this rotational movement is limited by engagement of the ends of the legs 12 with the rear faces of slots 18 and the forward faces 21 of recesses 19, respectively.
  • the cap member 4, which is set behind the blade units in the shaving direction, is constrained and guided for vertical movement only, parallel with the corresponding movement of the blade units.
  • the cap member is also urged to its outermost position by its respective wire springs 6, as shown in Fig. 3.
  • Fig. 4 shows the moving parts in their innermost positions, in which their springs 6 are “bottomed” against the base 2 of the frame.
  • the cap and blade units are able to conform closely to the differing contours of the skin areas being shaved by virtue of their being able to move, independently of each other and against the resilient restoring forces of their springs, according to the forces which they experience.
  • This independence of motion is known in itself but, significantly, the blade units are also able to pivot freely in order to permit each unit to maintain close contact with the skin at both its cutting edge 7A and its skin engaging guard surface 11, thus preserving its optimum attitude in spite of variations in the contours of the skin surface. This is due to the fact that the pivotal axis of each unit is parallel with and just ahead of the sharpened edge of the blade.
  • Fig. 5 the variations in skin contours are exaggerated to illustrate the way in which the moving parts of the razor accommodate undulations in the skin surface and in particular how the attitudes of the blade units are adjusted automatically to maintain the desired contact with the skin.
  • the razor could of course have a single blade unit or three or more if desired, but two units are presently regarded as optimal.
  • Figs. 6 and 7 illustrate a modified form of blade unit and head frame which are generally similar to the above described embodiment but with some structural modifications, principally as described below. Parts of the modified embodiment are given reference numerals increased by 100 compared with the numerals used for corresponding parts in the first embodiment.
  • the blade units 105 are virtually identical with those first described, save that the ears 114 are in the same plane as the guard portion rather than being upwardly offset. As a result the pivotal axis 'A' of the unit is set lower than in the first embodiment.
  • the moulded head frame 101 is of a different construction, being provided in known manner with depending legs 22 by which the frame is adapted for releasable mounting on the upper end of a razor handle with limited freedom to pivot, relative to the handle, about a longitudinal axis.
  • the upper surface of the base 102 is formed with an upstanding pip 102A destined to provide an integral rivet for securing a metallic spring member comprising a rectangular medial portion 106A having integral spring fingers 106 extending longitudinally away, and also upwardly from the plane of the portion 106A.
  • the rear wall of the frame 101 is formed with a channel to receive the cap moulding 117 in a fixed position.
  • the slots 118 and recesses 119 are completely open from above and separate clips 123 are provided for retaining the blade units by their ears 114, to the frame.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dry Shavers And Clippers (AREA)
  • Gloves (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Sawing (AREA)
  • Knives (AREA)
EP91907778A 1990-03-27 1991-03-22 Safety razors and blade units therefor Expired - Lifetime EP0522071B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9006782 1990-03-27
GB909006782A GB9006782D0 (en) 1990-03-27 1990-03-27 Safety razors and blade units therefor
PCT/US1991/001926 WO1991014546A1 (en) 1990-03-27 1991-03-22 Safety razors and blade units therefor

Publications (3)

Publication Number Publication Date
EP0522071A1 EP0522071A1 (en) 1993-01-13
EP0522071A4 EP0522071A4 (en) 1993-05-19
EP0522071B1 true EP0522071B1 (en) 1996-10-02

Family

ID=10673307

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91907778A Expired - Lifetime EP0522071B1 (en) 1990-03-27 1991-03-22 Safety razors and blade units therefor

Country Status (19)

Country Link
EP (1) EP0522071B1 (uk)
JP (1) JP3085974B2 (uk)
KR (1) KR0174756B1 (uk)
CN (1) CN1035163C (uk)
AT (1) ATE143624T1 (uk)
AU (1) AU649665B2 (uk)
BR (1) BR9106269A (uk)
CA (1) CA2076534C (uk)
CZ (1) CZ283054B6 (uk)
DE (1) DE69122500T2 (uk)
DK (1) DK0522071T3 (uk)
ES (1) ES2092564T3 (uk)
GB (1) GB9006782D0 (uk)
GR (1) GR3021275T3 (uk)
PL (1) PL166706B1 (uk)
RU (1) RU2091211C1 (uk)
TR (1) TR27611A (uk)
UA (1) UA25899C2 (uk)
WO (1) WO1991014546A1 (uk)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8087599B2 (en) 2009-05-07 2012-01-03 Aurora Office Equipment Co., Ltd. Anti-paper jam protection device for shredders
US8146845B2 (en) 2008-08-06 2012-04-03 Aurora Office Equipment Co., Ltd. Shanghai Automatic shredder without choosing the number of paper to be shredded
US8963379B2 (en) 2006-07-14 2015-02-24 Aurora Office Equipment Co., Ltd. Shanghai Paper shredder control system responsive to touch-sensitive element

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69225324T2 (de) * 1991-07-18 1998-11-05 Warner Lambert Co Rasierkopf mit einer veränderlichen rasiergeometrie
US5341571A (en) * 1993-04-16 1994-08-30 American Safety Razor Company Movable blade shaving cartridge or the like
GB9505917D0 (en) * 1995-03-23 1995-05-10 Gillette Co Safety razors
US5689883A (en) * 1995-05-08 1997-11-25 Warner-Lambert Company Shaving implement
WO1997035693A2 (en) 1996-03-27 1997-10-02 Warner-Lambert Company Shaving system with uniform shaving forces
US6009624A (en) * 1997-09-30 2000-01-04 The Gillette Company Razor cartridge with movable blades
JP4950507B2 (ja) 2006-02-14 2012-06-13 株式会社貝印刃物開発センター 剃刀
JP4977374B2 (ja) 2006-02-14 2012-07-18 株式会社貝印刃物開発センター 剃刀
JP4950506B2 (ja) 2006-02-14 2012-06-13 株式会社貝印刃物開発センター 剃刀
CN102164721B (zh) * 2008-09-29 2014-06-25 吉列公司 具有穿孔刀片组件的剃刀刀片架
CN102300683B (zh) * 2008-12-19 2014-10-22 比克-维尔莱克 剃刀盒架以及包括该盒架的机械剃刀
WO2011008851A2 (en) * 2009-07-15 2011-01-20 Eveready Battery Company, Inc. Razor blade technology
EP3072646B1 (en) * 2015-03-25 2020-06-17 The Gillette Company LLC Shaving razor cartridge
CN106098254B (zh) * 2016-07-14 2017-08-29 广州市明创线缆有限公司 一种电缆线手动绞制设备及其使用方法
CN109514230B (zh) * 2018-12-29 2023-06-20 温州美葆科技技术有限公司 一种手动剃须刀全自动组装设备及其控制方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3019399A1 (de) * 1979-05-25 1981-04-23 The Gillette Co., 02199 Boston, Mass. Kopf eines sicherheitsrasierapparates
US4337575A (en) * 1980-08-07 1982-07-06 The Gillette Company Razor blade assembly
GB2131337B (en) * 1982-12-07 1985-10-30 Gillette Co Safety razors
US4586255A (en) * 1984-10-15 1986-05-06 The Gillette Company Razor blade assembly
US4709477A (en) * 1986-09-02 1987-12-01 Warner-Lambert Company Blade assembly featuring variable span
US4932122A (en) * 1987-12-21 1990-06-12 The Gillette Company Safety razor blade assembly

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8963379B2 (en) 2006-07-14 2015-02-24 Aurora Office Equipment Co., Ltd. Shanghai Paper shredder control system responsive to touch-sensitive element
US8146845B2 (en) 2008-08-06 2012-04-03 Aurora Office Equipment Co., Ltd. Shanghai Automatic shredder without choosing the number of paper to be shredded
US8087599B2 (en) 2009-05-07 2012-01-03 Aurora Office Equipment Co., Ltd. Anti-paper jam protection device for shredders

Also Published As

Publication number Publication date
KR0174756B1 (ko) 1999-02-18
DK0522071T3 (da) 1997-02-17
JPH05505746A (ja) 1993-08-26
GB9006782D0 (en) 1990-05-23
GR3021275T3 (en) 1997-01-31
CA2076534C (en) 1998-10-06
DE69122500T2 (de) 1997-04-03
JP3085974B2 (ja) 2000-09-11
ATE143624T1 (de) 1996-10-15
CZ283054B6 (cs) 1997-12-17
UA25899C2 (uk) 1999-02-26
ES2092564T3 (es) 1996-12-01
PL166706B1 (pl) 1995-06-30
CN1035163C (zh) 1997-06-18
TR27611A (tr) 1995-06-13
AU7653291A (en) 1991-10-21
KR930700267A (ko) 1993-03-13
BR9106269A (pt) 1993-04-13
CA2076534A1 (en) 1991-09-28
EP0522071A4 (en) 1993-05-19
RU2091211C1 (ru) 1997-09-27
DE69122500D1 (de) 1996-11-07
AU649665B2 (en) 1994-06-02
EP0522071A1 (en) 1993-01-13
CN1057807A (zh) 1992-01-15
CS9100834A2 (en) 1991-11-12
WO1991014546A1 (en) 1991-10-03

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